This one put a grin on my face. If only we could see those exclamation marks in real life. It's simple, but well-executed. One thing you could improve would be to give an indication of how far your attack reaches as you're charging it up.

could you explain how the theme applies in your game?

I liked the way it was presented on its page and the premise with the masks lol, but it could have had some more animations to help you visualize your shots and hits to the enemies, as well as maybe some simple music and more levels.